David Craven

fyi, cargo-apk is slowly being replaced my [xbuild](https://github.com/cloudpeers/xbuild). I'd recommend you give that a try first, and let us (xbuild/cargo-apk maintainers) know if you're missing some functionality from cargo-apk.

Don't think there is much point discussing this before #663 is resolved. I don't think this solution conflicts with the fairly simple and straightforward setting an environment variable solution.

So to summarize the behaviour of xcrun (what @indygreg said): 1. if SDKROOT is set return that 2. if DEVELOPER_DIR is set select an sdk from developer dir 3. use...

> This code probably isn't suitable for inclusion in this crate as-is. But if you want me to extract it to its own crate or incorporate it into cc-rs somehow,...

@indygreg Haven't tried it yet, but looks very well documented and tested. Thank you!

So basically apple-sdk needs a bin called xcrun or cc-rs needs to replace their sdk selection logic with apple-sdk. I guess either option works, we really need to hear from...

well, I don't think there is much precedent for cross compiling ios applications from non macos systems without xcode installed, even though it is certainly possible. xcode sets the SDKROOT...

well, worst case something doesn't compile. since apple believes everyone runs a mac, sdkroot should always be the target sdk and not the host sdk. this means that rust needs...

This PR is explicitly about avoiding xcrun. I understand that that is fine for mac users, but this PR is explicitly about enabling linux users to build ios binaries. This...

@brson how do you suggest impl compatible implementations? To me __mulsi3 does not constitute a specification. So anyone who has ever looked at gcc code can't impl a c compiler...